參數(shù)資料
型號: SC470
廠商: Semtech Corporation
英文描述: Synchronous Buck Controller for Dynamic Load-Voltage Applications
中文描述: 同步降壓控制器的動態(tài)負(fù)載電壓應(yīng)用
文件頁數(shù): 19/31頁
文件大小: 574K
代理商: SC470
19
2005 Semtech Corp.
www.semtech.com
SC470
POWER MANAGEMENT
Application Information (Cont.)
As shown below, VOUT and VSSA should be routed as a differential pair to the output capacitor(s).
C11
1uF
0603
R4
20k0
0402
R8
20k0
0402
EN/PSV
1
TON
2
VOUT
3
VCCA
4
FB
5
PGD
6
VSSA
7
PGND
8
DL
9
VDDP
10
ILIM
11
LX
12
DH
13
BST
14
U2
SC470
VOUT
+
C7
220u/25m
7343
VOUT
C6
56p
0402
R12 0R (2)
0402
+
C14
220u/25m
7343
VOUT
VSSA
Figure 11: Differential Routing of Feedback and Ground Reference Traces
Next, the schematic in Figure 12 below shows the power section. The highest di/dts occur in the input loop (highlighted
in red) and thus this loop should be kept as small as possible.
Q1
IRF7811AV
Q2
FDS6676S
C2
2n2/50V
0402
VBAT
L1
2u2
+
C7
220u/25m
7343
VOUT
R6
0R (2)
0402
+
C6
220u/25m
7343
C3
0u1/25V
0603
C4
10u/25V
1210
Figure 12: Power Section and Input Loop
The input capacitors should be placed with the highest frequency capacitors closest to the loop to reduce EMI. Use
large copper pours to minimize losses and parasitics. See Figure 13 on Page 20 for an example.
相關(guān)PDF資料
PDF描述
SC470EVB Synchronous Buck Controller for Dynamic Load-Voltage Applications
SC470IMLTRT Synchronous Buck Controller for Dynamic Load-Voltage Applications
SC470ITSTRT Synchronous Buck Controller for Dynamic Load-Voltage Applications
SC471EVB Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC471MLTRT Synchronous Buck Controller with Multi-Level VOUT Transition Support
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC470EVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller for Dynamic Load-Voltage Applications
SC470IMLTRT 功能描述:IC REG CTRLR BUCK PWM 16-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
SC470ITSTRT 功能描述:IC REG CTRLR BUCK PWM 14-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
SC471 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Multi-Level VOUT Transition Support
SC471_08 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Controller with Multi-Level VOUT Transition Support